FX Impact M3 STX barrel kit

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I shot one of my M3’s for almost a year with a 500mm barrel using H&N 27gr hollow points. It was stupid accurate and consistent at around 930fps. It was a hunting gun but I had full confidence out to 115 yards. Why did you switch to a 600mm? Unless you’re shooting 33.95’s, I don’t think it’s necessary. I have three M3’s and personally will never do a first reg delete. If I ever buy a M4, a first reg and gauge will be ordered with the gun.
 
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Well, if my m3 sat for an hour or longer the first several maybe ten shots were off target. That was unacceptable, I red about the first reg delete and that’s what I did. That solved the problem. Instead of buying the m4 I figured I would just upgrade my m3. I think the 600mm barrel is a good addition, not much of a change and it looks better. And if I want to go back to the 500mm barrel I can do that.
 
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That’s very interesting about your first ten shots being off target. Impacts dating back to the MKll’s (single reg guns) were plagued with slow first shots, but they were still generally close depending on how bad the symptoms were. I make barrels for my Impacts now and the most versatile barrel length is 560mm in .25. So putting cosmetics aside, after you retune your gun with the 600mm, it will be a little more versatile. You won’t have to be on full blown slug settings to shoot a 33.95gr.
 
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